A three-judge panel in federal appeals court sided with TiVo in March, but that ruling in now under review by the full court.

The U.S. Patent and Trademark Office had a different take in its ruling filed last week. In what is supposed to be its final action in the matter, the office rejected two of TiVo’s patent claims.

Dish had requested the office review TiVo’s “time warp” patent, citing obviousness and prior art. “Prior art” refers to evidence that an invention is not original and doesn’t merit a patent; the patent office may not have been aware of such evidence when it originally approved the patent.

TiVo said in a statement Tuesday that it is “disappointed” with the patent office’s decision and that the company will keep working with it “to explain the validity of the claims under review.”

The company added that the decision is separate from its lawsuit against Dish.

The court ruling is likely to have a bigger impact on TiVo and Dish.

Until the appeals court granted a broader review of the case, Dish faced the prospect of having to pay $300 million in damages and could have been forced to disable millions of its DVRs infringing on TiVo’s patent. TiVo has said it still expects to prevail in the court case.

In a note to investors, Stifel Nicolaus analyst Rebecca Arbogast said TiVo can challenge the office’s decision — an action that could last for a couple of years.

Meanwhile, JPMorgan analyst Bridget Weishaar said in a client note that she doesn’t believe the patent office’s decision will hamper the review of TiVo’s lawsuit with Dish.

Dish Network, which is based in Englewood, Colo., said in a statement that it was pleased with the patent office’s decision.